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nasty-shy [4]
3 years ago
7

Simplify 9 − (−4). −13 −5 5 13

Mathematics
2 answers:
andrew11 [14]3 years ago
8 0
- - = +   9-(-4)= 9+4 so minus minus becomes plus. and 13 is the answer.
agasfer [191]3 years ago
5 0
When subtracting integers, you add by the opposite sign. Right now, you are subtracting 9 by -4. Change this to adding 9 + (+4). Of course, 9 + 4 = 13.

The answer is 13 or D.
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3 years ago
Please help me!!!! I will mark brainlist.
Misha Larkins [42]

Answer:

angle 1 =135

Step-by-step explanation:

it is 180 degrees total. We know that there are two angles that have a ratio to 3:1. So, assign x to 2. Since 1 = 3x, we do 3x+x =180

4x=180

x=45 or angle 2

180-45=135 or angle 1

Multiply angle 2 by 3 to check if its correct

8 0
3 years ago
Read 2 more answers
I need to answer this :<br><br>Thanks for helping!!
ddd [48]
School bus : 9 tons = 9*2000 = 18,000 pounds
Horse : 1,100 pounds
Elephant : 5,500 kilograms = 5,500*2.2 = 12,100 pounds
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So the answer is
6 0
4 years ago
Please help, solve for x and n
Vlada [557]

Answer:

1. \boxed{ \bold{ \huge{ \boxed{ \sf{x = 1}}}}}

2. \boxed{ \bold{ \huge{ \boxed{ \sf{n =  - 5}}}}}

Step-by-step explanation:

1. \sf{ \frac{6}{x + 1}  =  \frac{3}{x} }

Do cross multiplication

\dashrightarrow{ \sf{6x = 3(x + 1)}}

Distribute 3 through the parentheses

\dashrightarrow{ \sf{6x = 3x + 3}}

Move 3x to left hand side and change it's sign

\dashrightarrow{ \sf{6x - 3x = 3}}

Collect like terms

\dashrightarrow{ \sf{3x = 3}}

Divide both sides by 3

\dashrightarrow{ \sf{ \frac{3x}{3}  =  \frac{3}{3} }}

Calculate

\dashrightarrow{ \sf{x = 1}}

The value of x is 1

---------------------------------------------------------------------

2. \sf{ \frac{2}{6}  =  \frac{2n + 8}{n - 1}}

Do cross multiplication

\dashrightarrow{ \sf{2(n - 1) = 6(2n + 8)}}

Distribute 2 through the parentheses

Similarly, distribute 6 through the parentheses

\dashrightarrow{ \sf{2n - 2 = 12n + 48}}

Move 12n to left hand side and change it's sign

Similarly, move 48 to right hand side and change it's sign

\dashrightarrow{ \sf{2n - 12n = 48 + 2}}

Collect like terms

\dashrightarrow{ \sf{ - 10n = 48 + 2}}

Add the numbers : 48 and 2

\dashrightarrow{ \sf{ - 10n = 50}}

Divide both sides by -10

\dashrightarrow{ \sf{ \frac{ - 10n}{ - 10}  =  \frac{50}{ - 10} }}

Calculate

\dashrightarrow{ \sf{n =  - 5}}

The value of n is -5 .

Hope I helped!

Best regards! :D

7 0
3 years ago
Y=5cos(20x) find amplitude, period &amp; graph
bagirrra123 [75]
Amplitude is 5
period is 360/20 = 18 degree
Im lazy to do graph
5 0
3 years ago
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